geant4/LEMuSR/include/lem4TabulatedField2D.hh

@@ -0,0 +1,52 @@
+#include "globals.hh"
+#include "G4MagneticField.hh"
+#include "G4ios.hh"
+//cks For the special case of muon decay:
+//#include "G4EventManager.hh"
+//#include "G4RunManagerKernel.hh"
+//csk
+
+#include <fstream>
+#include <vector>
+#include <cmath>
+
+
+class lem4TabulatedField2D
+#ifndef STANDALONE
+ : public G4MagneticField
+#endif
+{
+  
+  // Storage space for the table
+  std::vector< std::vector< double > > xField;
+  std::vector< std::vector< double > > zField;
+  // The dimensions of the table
+  int nx,nz; 
+  // The physical limits of the defined region
+  double minx, maxx, minz, maxz;
+  // The physical extent of the defined region
+  double dx, dz;
+  double ffieldValue;
+  bool invertX, invertZ;
+  double positionOffset[4];
+
+  static lem4TabulatedField2D* pointerToTabulatedField2D;
+
+public:
+
+  static lem4TabulatedField2D* GetInstance();
+
+  lem4TabulatedField2D(const char* filename, double fieldValue, double lenUnit, double fieldNormalisation );
+  //  "lenUnit" is the unit in which the grid coordinates are specified in the table
+  //  "fieldNormalisation" is the normalisation that has to be applied on the field values in the table
+  //                       such that the values correspond do 1T nominal value
+  //  "fieldValue" is the field value (in T) that is required (i.e. values normalised to 1T will be
+  //                       multiplied by this value).
+  void  GetFieldValue( const  double Point[4],
+		       double *Bfield          ) const;
+  G4double GetFieldSetValue();
+  void SetFieldValue(double newFieldValue);
+  void SetPositionOffset(double offset[4]) { positionOffset[0]=offset[0]; positionOffset[1]=offset[1];
+    positionOffset[2]=offset[2]; positionOffset[3]=offset[3];}
+};
+